Adjustable valve for damping of oscillations, with an emergency operating device, uses battery as emergency power supply to bring valve to emergency operating position

摘要

The valve has a body with variable part, displaced by an electric servomotor (3) supplied from a primary electric source (11) and, in the case of failure of the primary source, from a secondary electric source (15). The secondary source is an electric battery, which is used to set (9) the valve to an emergency position. A diode (17) prevents current passing from secondary to primary source.